The European Space Agency (ESA) WorldCover 10 m 2020 product provides a global land cover map for 2020 at 10 m resolution based on Sentinel-1 and Sentinel-2 data. The WorldCover project, part of the 5th Earth Observation Envelope Programme (EOEP-5), had the objective to produce, deliver and validate, as fast as possible, a global 10 meter resolution land cover (LC) map of the world within 3 months of the last data acquisition with a minimum of 10 land cover classes and a minimum overall accuracy of 75%.
The WorldCover product comes with 11 land cover classes:
| land cover class | land percent | year |
|---|---|---|
| Trees | 80.85 | 2020 |
| Cropland | 11.47 | 2020 |
| Grassland | 2.72 | 2020 |
| Barren / sparse vegetation | 2.25 | 2020 |
| Built-up | 1.53 | 2020 |
| Open water | 1.15 | 2020 |
| Shrubland | 0.02 | 2020 |
| Herbaceous wetland | 0.00 | 2020 |
Natural ecosystems contain more species than human-altered landscapes, hence, the higher the percentage of natural areas compared to that of the total city area gives an indication of the amount of biodiversity.
Natural ecosystems are defined as all areas that are natural and not highly disturbed or completely human-altered landscapes. Examples of natural ecosystems include forests, mangroves, freshwater swamps, natural grasslands, streams, lakes, etc. Parks, golf courses, roadside plantings are not considered as natural. However, natural ecosystems within parks where native species are dominant can be included in the computation.
This indicator is calculated as the percent of natural area within the city boundary: (Total area of natural, restored and naturalised areas) ÷ (Area of city) × 100%
Based on the assumption that,by definition, a city comprises predominantly human-altered landscapes, the maximum score will be accorded to cities with natural areas occupying more than 20% of the total city area.
| city_id | indicator_name | indicator_number | value | score |
|---|---|---|---|---|
| CHN-Chongqing | Proportion of natural areas | I1 | 84.74 | 4 |